Automated diplomacy.
If one county's population exceeds the population of the other 2 countries combined for say 20 minutes, then the 2 smaller countries automatically form an alliance against the larger country. This would have the following effects for the allied countries:
They could no longer shoot each other down (with some warning before killshooter toggles on).
They could no longer damage each other's bases or strategical targets.
They can sortie from each other's bases.
Their communications channels are combined.
If the population of the larger country falls below the population of the alliance for more than 20 minutes, then the alliance ends and its back to a 3 country war.
I don't care about this issue and I don't know how tough this would be to implement, but this would be a way to equalize the numbers between opposing sides.
